Ordnance



A. T. DAWSON AND J.v HORNE.

ORDNANCE. APPLICATION FILED OCT. 25, 1921.

Patented July 25, 1922.

2 SHEETS-SHEET l.

A. T. DAWSON AND J. HORNE.

ORDNANCE. APPLICATION FILED OCT. 25. 1921.

' Dawson, hart, and Jeanne HORNE,

' land, and Naval Construction Works,

m E t t,

UNETEE gTAT ARTHUR TREVOR DAWSON, OF

BABROW-IN-FUBNESS, ENGLAND, MINSTER, ENGLAND.

ORDNANGE.

Specification of Letters Patent.

Original application filed September 4, 1920, Serial No. 408,320. Divided and this application filed October 25, 1921.

To all whom it may concern:

Be it known that we, Sir ARTHUR Tnnvon both subjects of the King of Great Britain, residing, respectively, at Vickers House, Broadway, Westminster, in the county of London, Eng

row-in-Furness, in the county of Lancaster, England, have invented certain new and useful Improvements Relating to Ordnance, of which the following is a specification.

This invention relates for its object to devise improved means for applying graphite or other suitable substance of a similar nature to the bore of the gun so as to minimize erosion during firing and thereby prolong the effective life of the un. 6 According to this invention the said improved means comprise a spraying or similar device which is so constructed and arranged as to enable the graphite or similar substance to be readily applied to the portions of the bore that are most liable to the erosive action, this device including a container for the graphite (which is in powder form either dry or mixed with water, oil, or other liquid) and a nozzle (herein termed the air nozzle) operating on the injector principle by means of air under pressure. The air under pressure may also be admitted to the upper part of the container to exert pressure on the graphite so as to cause the latter to be forced through an opening contiguous to the air nozzle and a control valve for regulating and cutting off the air supply may also serve to admit air to and cut it off from the container, the arrangement being such that when the supply of air to the air nozzle is cut off air will be prevented from entering the container; the container can therefore readily be re-charged or replenished with graphite through a hole normally closed by a plug.

In order that the said invention may be clearly understood and readily carried into eifect, the same will be more fully described with reference to the accompanying drawings, in which Figure 1 is a vertical longitudinal section of the breech end of a gun shewing diagrama rear elevation of Figure 1.

Bar-' to ordnance and has Serial No. 510,381.

Figure Sis a plan (with part in section) of Figure 1. Figure a is a sectional rear elevation showing thespraying device of Figures 1, 2 and on an enlarged scale. 7 Figure 5 is a plan of igure l with the right hand portion in section on the line 5-5 of Figure at, and

Figures'o'. 7 and 8 are sections taken approximately on. the lines 66, 7T"and 8-8 respectively of Figure 4a v A is the graphite container of the spraying device, P is the air nozzle and C is the spray ng nozzle. D is the'supply pipe or conduit conveying air under pressure to the container and to the air nozzle; E is the control valve for this air supply and F is the trigger or handle for operating this valve. The container A, the air nozzle B and the spraylng nozzle C are carried by an arm K pivoted by a vertical pivot K to the rear art oi the gun so that the container and the nozzles can be swung from the inoperative or housed position (she'wn by chain lines in Figures 2 and 3) in which they are out of the way of the breech mechanism, into the operative or spraying position (shewn by full lines) with the spraying nozzle directed into the gun. The said spraying nozzle need not be arranged to project far or at all into the breech chamber when air under very high pressure is available. The

control valve E and its operating handle F are carried by a non-swinging part (in the arrangement shewn by the upper part of he pivot K) and air under pressure from the control valve flows through an axial hole in the pivot K through lateral holes in'this pivot and into an annular cavity 70 in the boss of the arm K. From this annular cavity the air flows through a hole la in the arm K to a cavity 70 (see Figure 8) in the lower wall of the container A. This cavity communicates with a pipe A conveying the air to the upper part of the container and serves to receive the enlarged head B of the nozzle B so that when air is admitted to the cavity 10 the nozzle is moved to the open position shewn by full lines in Figure 8. In this position air passes to the bore of the nozzle through lateral holes therein. Means are employed for locking the arm K in either of its two positions and for ensuring that the valve shall not be opened until the container and nozzles assume the operative or spraying position. For this purpose the boss of the arm has two notches K K in which the handle (which is spring controlled) is adapted to engage to hold the arm in either of its two positions; -the notch K appertains to the inoperative or housed position of the arm and is at a greater radial distance from the pivotal axis of the arm than is the other notch K which appertains to the operative position of the arm so that whilst the handle is free to move in the latter notch to open the control valve it can not be so moved when in the notch K nor when the arm is in any intermediate position as at such times the handle is in engageinent with a cam-shaped rib or flange situated between the two notches In this construction the filling plug G is carried by a plate I, which is slidably and pivotally connected to a pin G on the container so that after the plug has been unscrewed it can be moved to one side to enable the container to be filled and then moved back into position after the filling operation has been performed.

What we claim and desire to secure by Letters Patent of the United States is 1. For use with ordnance, a device for spraying a substance into the bore of the gun, said device comprising in combination an arm pivoted to the rear part of the gun,

a container for the said substance and injector nozzle and a spraying nozzle all car ried by said arm so as to be capable of being brought by movement of said arm from the inoperative or housed position in which they are out of the way of the breech mechanism, into the operative or spraying posi tion with said spraying nozzle directed into the gun.

2. F or use with ordnance, a device for spraying a substance into the bore of the gun, said device comprising in combination an arm pivoted to the rear part of the gun, a container for the said substance and an injector nozzle and a spraying nozzle all carried by said arm so as to be capable of being brought by movement of said arm from the inoperative or housed position in which they are out of the way of the breech mechanlsm, into the operative or spraying posi tion with said spraying nozzle directed into the gun, means for locking the arm in either of its two positions and means for ensuring that the spraying device shall not be caused to operate until said arm occupies the position with the spraying nozzle directed into the gun.

3. For use with ordnance, a device for spraying a substance into the bore of the gun, this device comprising in combination a container for said substance and a nozzle operating on the injector principle by means of fluid under pressure, a valve for controlling the supply of pressure fluid to said nozzle, a device for moving said valve to its posi tion to admit pressure fluid to said nozzle and means whereby when said valve is so moved pressure fluid will effect the movement of said nozzle to its operative position.

ARTHUR TREVOR DAWSON. JAMES HORNE. 

